LCD / PC question

[luminas]

thanks Kamikaze

After few hours trying any possible setup, I solved the problem

The problem is with HSPLL config.

If I change the config to:
_FOSC_HS_1H
define osc 10, it works

but if I change the config to :
_FOSC_HSPLL_HS_1H
define osc 40, it did not work as expected

HSPLL suppose to multiply the frequency, and if I define osc to 40 ( 4x ) it should be working right out of the box , right ? Or did I forget something ?

Could anyone share information about this ?

[Kamikaze47]

The PLL expects an input frequency that is a multiple of 4, which your 10 Mhz clock is not.

For this PIC I usually use a 4Mhz crystal with _PLLDIV_1_1L, _CPUDIV_OSC1_PLL2_1L, and _USBDIV_2_1L which results in a 48Mhz clock for the processor.

Have a look at the table in the data sheet on pages 29 and 30.

edit: also have a look at the figure on page 24 - it shows that the PLL must have a 4Mhz input.